Fuse



June 12, 1923.

H. GOODWIN FUSE Filed Feb. 9, 1922 HQLZ/ Goodwin.

. To all whom it may concern.'

Patented June l2, 1923.

HALL GOODWEN",l 0l' CHICAGO, ILLINOIS.

appumioamea remary a, 19u.. semi No. 535,205.

Be it known that I, Hau.` Goo'mvIN .a citizen of the United States,residin at dhilca o, in the county of Cook and tate of Illinois, haveinvented new anduseful Imrovements .inF uses, of which the following isa specification. x n

This invention .relates to electric fuses in which the fusible element.is so held that it can be removed forrenewal when it becomes ruptured,and its objectv is to provide a lfuse of this kind which. isver .simpleand inexpensive in construction, t emeans whereby the fusibleclementis.held' being so 4constructed and arranged, thatY said element issecurely held in place, and4 at the Sametime, is readily removable forAreplacement.

.The object statedis attainedl by means of a novel -combinationandarrangement of parts to be hereinafterl described and c1aimed,.and inorder that the .same may be better` understood, referenceis had to theaccompanying drawing, wherein .Figure ..1 is. an elevation ofV thedevice; Fig. 2 isav:fiontand...vie wl thereof; Fig. .3'

is ar rearend/.viewbf a4 ca .;.Fig. 4 is. an enlarged.centralpsectiomiig. 5..isv a view similar to- Fig. 4, partly broken awayand -withoutza'.5 oap,"zshmving certain holding members in another position; Fig.6.5isy an Fig. 7 is a sectional detail on the line 7"-7 ofFi.5.

Referring specifically to the drawing, the fuse is of that t pe in whichthe body has the form of a p ug which is adapted to be screwedinto aba'se socket containing the contacts by which the fuse in interposed inthe electric circuit to be protected. The body ofthe plu is shown at 5,the saine being formed o a suitable insulating 'or non-conductivematerial. The plug body has a chamber 6 o nin through one end thereof,and on this en of the plug body is removably mounted a ca 7 carrying atits outer end a glass lens 8 orming a transparent closure for thechamber 6. The.. other end of the, plug body is fitted externally with asleeve 9 of conductive material, which is formed with helical corruations to produce the screw threads by which the plug is screwed intothe base socket.

In the last-mentioned end of the plug body 5 is centrally embedded aconductor rod 10 having its outer end formed with a head 11 by whichconnection is made with readily one of thecontacts interposed in thecircuit to .be protected. The connection with the other contact is bythe way. of lthe sleeve 9' as usual.

At diametrically opposite points, the plugl .body 5 carries holders forthe fusible element, the ,latter being a strip 12 having antenlargement.intermediate its ends containing an inscrilption denotingthe voltage and amperage w ich the strip is .intended to carry. Thestrip extends across the o en chambered end of the. lu bod 5 so t at the'inscription is visib e throng the glass 8, and it can also be readilascertained.

whether the strip is intactyor s been ruptured, or fused. Theglass.8.is.set sunken so that if the plug should be dropped the `glassis not apt to be"fracturedy as it will not come in contact with the.floor lor other surface. The glass is molded ,with the cap 7, thelatter being formed of hard .rubber or other insulating ornon-conductivematerial.

The end ofthecap; 7 has .aninternal annular rib 13 which is adaptedtoseat in a corresponding groove 14 in theedge of the 5 .through .which.the chamber 6 opens. separable 'connection between the plugbody- .andthe capl 7 is had by formling the interior of the latter with. an annu-;,lar .recess 15 1ny whichfseat lugs.16 formed end view of the .devicewithout the cap, and

on the outside of theplug bodyat' diametrically opposite points. Theinner end of the cap has diametrically opposite channels17 leadlng tothe recess 15. The lugs 16 andthe recess 15 are arranged obliquely sothat i when the cap is given a slight turn a Wedg- Ving action 1sproducedbetween the lugs and the walls of the recess, by which the capis drawn inwardly and its outer end is drawn turning it until the lugs16 are in line wit the -channels 17, after which the cap can be slip edoif, the lugs passing through the c annels.

To the inner end of the sleeve 9 is soldered or otherwise rigidly andelectrically connected one end of a conductor strip 18 having its otherend secured to the plug tbody 5 byy a hook-shaped bend 19 which isengaged across the edge of the open end of the plug body-5, said edgehaving a notch or recess 20 in which the transverse portion of the bendseats, the extremity of the bend extending into thechamber 6 to 'Thestrip engage the wall thereof. The strip 184 extends lengthwise of the.plug body on the against t e outside'of the strip 18 when the vjaw 23 isin strip-holding position, and in this position, the jaw is opposite andabove the terminal bend 19 of t e strip 18 where 4it extends acrosstheedge 'of the open end of the plug body, the end of the strip 12 beinglocated between said parts 23 and 18 and securely clamped when the cap 7is applied, the rib 13 thereof then bearing down on the jaw 23-to holdthe same firmly in strip-grippingposition.

The pivotal connectionk of the strip 22 with thestrip 18 is made byforming the latter with a ngitudinal slot 24 and forming the strip 22with a terminal loop 25 through which passes a pin 26 extendingtransversely of the strip and projecting from opposite edges of thelooped end, said looped end being reduced in width so that it may seatloosely in the slot 24, with the projecting ends ofthe pin 26 seatingbehind the strip 18 on opposite sides of the slot 24. This connection isalso a slidable one, and permits a slight play of the strip 22 rin thedirection of its length to enable the jaw 23 to properly engage the endof the strip 12 as hereinbefore described.

The groove21 is deep enoughvto leave no part of the strip 22 promotingfrom the outer surface of the plug dy 5 to interfere with theapplication of the cap 7, and

, when the latter 1s in place its interior surface is opposite the strip22 so that it is now impossible for the latter to swing 'outwardly todisengage its jaw 23 from the strip 12.

The gripping or clamping means for the other end of the strip 12 are thesame as the ones just described, and hence the description need not berepeated, and the same reference numerals with the prefix a have beenapplied thereto in the drawing. However, Ithe strip 18 is connected tothe inner end of the terminal rod 10 where it extends into the chamber6, said end of the rod carrying nuts 27 between which is clamped alateral inward bend 18b of the strip, said bend passing through the sideof the .chambered portion of the plug body 5.

In order to permit the escape of ses from the chamber 6 when the fusestrip 12 blows, the chambered portion 6 of the plug body 5, and the sideof the cap 7, have perforations 28.

It will be evident from the foregoing that the fusible strip can bereadily removed. when it is to be renewed, b merely removing the cap 7and swinging the holdin members 22 and ,22 outwardly, after whic the newstrip can be applied, and upon swinging the holding members back toholding position, and replacing the cap, the fuse is again ready foruse.

I claim: v

1. An electric fuse comprising a cham'- bered plug of insulatingmaterial, the .chamber opening through one end of the plug, a fusibleelement extending across the outer end of the chamber, conductor memberscar# ried by theplug, with which members the ends of the fuslble elementare in contact,

Vpivoted clamping members carried by the conductor members andengageable with the ends of the fusible member for holding the same 1ncontact with the conductor members,

and a cap removably mounted on theendv of the plug through which thechamber opens, the lnterior-of said cap engaging the clamping membersfor malntalnlng the contact between the conductor members and the endsof the fusible element.

2. An electric fuse comprising a chaml bered plug of insulatingmaterial, the chamber opening through one end of the plug, a fusibleelement extendin across the outer end of the chamber, con uctor membersextending along the outside of the plugand having termlnal portionsextending across the end of the lug through which the chamber opens,with) which terminal portions the ends of the fusible element are incontact, clampin members pivoted to the conductor mem rs and extendingalong the outside thereof, said clamping members havin terminal portionslocated above the terminal portions of theconductor members to engagethe ends of the fusible element, and a'cap removably mounted on the endof the plug through which the chamber opens, the lnterior of the capengaging the clamping members and their terminal portions formaintaining the contact between-the terminals of the conductor memberand' the ends of the fusible element.

- 3. An electric fuse comprising a chambered plug of insulatingmaterial, the chamber o ning through one end of the plug, a fusib eelement extending across the outer end of the chamber, conductor membersextending along the outside of the plug and having the end ofthe pluthrough which the chamber opens, with w ich terminal portions the endsof the fusible element' are in contact, clamping members lpivoted to theconductor members and extending along the out nal portions of theconductor members to 'engage the ends .of the fusible-element, and

termmal portions extending across v a cap removably mounted on the endof the plug through which the chamber opens, the interior of the cahaving a rib engageable with the termina portions of the clampingmembers for maintaining the contact between the terminals of theconductor member and the ends of the fusible element.

4. An electric fuse comprising a chambered plug of insulating material,the chamber opening through one end of the plug, a fusible elementextendin across the outer end of the chamber, con uctor membersextending along the outside of the plug and having terminal portionsextending across the end ofthe plug through which the chamber opens,with which terminal portions the ends of the fusible element are incontact, clamping members pivoted to the conductor members and extendingalong the outside thereof, said clamping members having terminalportions located above the termlnal portions of the conductor members toengage the ends of the fusible element, and a cap removably mounted onthe end of the plug through which the chamber opens, the interior of thecap having an annular rib and the outer edge of thechamber having agroove in which the rib is adapted to seat, said rib being alsoengageable with the terminal portions of the clamping members formaintaining the contact between the terminals of the conductor memberand the ends of the fusible element.

5. An electric fuse comprising a chambered plug of insulating material,the chamber opening through one end of the plug, a fusible elementextending across the outer end of the chamber, conductor membersextending along the outside of the plug and having terminal portionsextending across the end of the plug through which the chamber opens,with which terminal portions the ends of the fusible element are incontact, clamping members having pivoted and sliding connections withthe conductor members and extending along the outside thereof, saidclamping members having terminal portions located above the terminalportions of the conductor members to engage the ends of the fusibleelement, and a cap removably mounted on the end of the plug throughwhich the chamber opens, the interior of the cap engaging the clampingmembers and their terminal portions for maintaining the contact betweenthe terminals pf the conductor member and the ends of the fusibleelement.

In testimony whereof I affix my signature.

HALL GOOD WIN.

